) | |
| Names | |
|---|---|
| IUPAC name Gold(III) oxide | |
| Other names Gold trioxide, Gold sesquioxide, Auric oxide | |
| Identifiers | |
3D model (JSmol) | |
| ECHA InfoCard | 100.013.748  |
PubChem CID | |
| UNII | |
CompTox Dashboard (EPA) | |
| |
SMILES
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| Properties | |
| Au2O3 | |
| Molar mass | 441.93 |
| Appearance | red-brown solid |
| Density | 11.34 g/cm3 at 20 °C[1] |
| Melting point | 160 °C (320 °F; 433 K) (decomposes) |
| insoluble in water, soluble in hydrochloric and nitric acid | |
| Structure | |
| Orthorombic, oF40 | |
| Fdd2, No. 43[1] | |
| Hazards | |
| NFPA 704 (fire diamond) | |
Except where otherwise noted, data are given for materials in their standard state (at 25 °C [77 °F], 100 kPa). | |
Gold(III) oxide (Au2O3) is the inorganic compound with the formula Au2O3. gold. It is a red-brown solid that decomposes at 160 °C.[2]
According to X-ray crystallography, Au2O3 features square planar gold centers with both 2- and 3-coordinated oxides. The four Au-O bond distances range from 193 to 207 picometers.[1] It was prepared by heating amorphous hydrated gold(III) oxide with perchloric acid and an alkali metal perchlorate in a sealed quartz tube at a temperature of around 250 °C and a pressure of around 30 MPa.[3]
References
- ^ a b c Jones, P. G.; Rumpel, H.; Schwarzmann, E.; Sheldrick, G. M.; Paulus, H. (1979). "Gold(III) oxide". Acta Crystallographica Section B. 35 (6): 1435. doi:10.1107/S0567740879006622.
- ^ Greenwood, Norman N.; Earnshaw, Alan (1997). Chemistry of the Elements (2nd ed.). Butterworth-Heinemann. ISBN 978-0-08-037941-8.
- ^ Jones, Peter G.; Rumpel, Horst; Sheldrick, George M.; Schwarzmann, Einhard (1980). "Gold(III) oxide and oxychloride" (open access). Gold Bulletin. 13 (2): 56. doi:10.1007/BF03215453.
External links
Media related to Gold(III) oxide at Wikimedia Commons
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